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As power increases, the stock fuel rail begins to struggle. COBB created these upgraded fuel rails to combat this issue and ensure your Subaru WRX STI's engine is kept well fed even at high HP levels. Made of 6061 billet aluminum and anodized black, each kit also uses AN adapters for a quick and secure installation. Each kit includes the hardware needed to install too.

Key Features:

• Kits are direct fit to each application.
• Some applications convert your factory side feed style injectors to top feed ones. Flows much more fuel than stock.
• Engineered for use in both return and returnless configurations.
• Uses large -8 AN to -6 AN adapters pre-installed for easy installation.
• Certain kits include fuel lines as well.
• Can use the stock or aftermarket fuel regulator.
• All hardware needed to install is included.
• CNC machined from solid billet T6061 billet aluminum.
• Features a sleek black finish.

Top Feed Fuel Rail Conversion Kit Notes: Modern top feed injectors are easier to tune, less expensive, and flow more fuel than the side feed alternatives. COBB Top Feed Fuel Rail Conversion Kits are engineered as a system where the injector, rails, and mounting hardware all work together to integrate flawlessly into the OE manifold and mounting points!